= = physical characteristics = = given the planet ' s high mass , it is likely that ups ##ilo ##n and ##rom ##eda ##e b is a gas giant with no solid surface . the spit ##zer space telescope measured the planet temperature , and found that the difference between the two sides of ups ##ilo ##n and ##rom ##eda ##e b of about 1 @ , @ 400 degrees ce ##ls ##ius , ranging from minus 20 to 230 degrees to about 1 @ , @ 400 to 1 @ , @ 650 degrees ce ##ls ##ius . the temperature difference has led to speculation that ups ##ilo ##n and ##rom ##eda ##e b is tidal locked with the same side always facing ups ##ilo ##n
= = physical characteristics = = given the planet's high mass, it is likely that upsilon andromedae b is a gas giant with no solid surface. the spitzer space telescope measured the planet temperature, and found that the difference between the two sides of upsilon andromedae b of about 1 @, @ 400 degrees celsius, ranging from minus 20 to 230 degrees to about 1 @, @ 400 to 1 @, @ 650 degrees celsius. the temperature difference has led to speculation that upsilon andromedae b is tidal locked with the same side always facing upsilon